content: /*
   * Copyright (C) 2015-present, Ant Financial Services Group
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * 	http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alipay.hulu.shared.node.utils;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * Created by qiaoruikai on 2018/10/8 4:30 PM.
   */
  public class NodeContext extends HashMap<String, Object> {
      public <T> T getField(String name, T defaultValue) {
          T target = (T) get(name);
          if (target == null) {
              return defaultValue;
          }
  
          return target;
      }
  
      public NodeContext() {
      }
  
      public NodeContext(Map<String, ?> m) {
          super(m);
      }
  
      public <T> T getField(String name) {
          return getField(name, null);
      }
  }
  